Briefcase



FIG. 1 is a perspective view of a briefcase showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, taken from the lefthand side of FIG. 2;

FIG. 4 is a side elevational view thereof, taken from the right side of FIG. 2;

FIG. 5 is a bottom plan view thereof; the top plan view being a mirror image of the bottom plan view;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a perspective view illustrating the briefcase in an open position to show portions of the interior thereof. 

The ornamental design for a briefcase, as shown and described. 